Step-by-step explanation:
[tex]f(x) = {x}^{2} - 5x + \frac{6}{5} [/tex]
[tex]f(x) = {x}^{2} - 5x + \frac{25}{4} - \frac{9}{5} [/tex]
f(x) =(x-5/2)^2-9/5
